Use it as normal LaTeX symbols. Espanso 2.x can expand the matches based on word boundary.
For example:
\alpha
expands to
α
package.yml
matches:-replace:'!'trigger:\mathexclamword:true-replace:'#'trigger:\mathoctothorpeword:true-replace:$trigger:\mathdollarword:true-replace:'%'trigger:\mathpercentword:true-replace:'&'trigger:\mathampersandword:true-replace:(trigger:\lparenword:true-replace:)trigger:\rparenword:true-replace:+trigger:\mathplusword:true-replace:','trigger:\mathcommaword:true-replace:.trigger:\mathperiodword:true-replace:/trigger:\mathslashword:true-replace:':'trigger:\mathcolonword:true-replace:;trigger:\mathsemicolonword:true-replace:<trigger:\lessword:true-replace:'='trigger:\equalword:true-replace:'>'trigger:\greaterword:true-replace:'?'trigger:\mathquestionword:true-replace:'@'trigger:\mathatsignword:true-replace:'['trigger:\lbrackword:true-replace:\trigger:\backslashword:true-replace:']'trigger:\rbrackword:true-replace:'{'trigger:\lbraceword:true-replace:'|'trigger:\vertword:true-replace:'}'trigger:\rbraceword:true-replace:"\xA3"trigger:\mathsterlingword:true-replace:"\xA5"trigger:\mathyenword:true-replace:"\xA7"trigger:\mathsectionword:true-replace:"\xAC"trigger:\negword:true-replace:"\xB1"trigger:\pmword:true-replace:"\xB6"trigger:\mathparagraphword:true-replace:"\xB7"trigger:\cdotpword:true-replace:"\xD7"trigger:\timesword:true-replace:"\xF0"trigger:\mathethword:trueShow more